2,1

Table of n, a(n) for n=2..43.

13 = 1101 in base 2, 231 in base 3, 31 in base 4, 23 in base 5, 21 in base 6 but 16 in base 7, so 13 ends in an odd digit from bases 2 to 6.

Sequence in context: A238476 A118889 A077149 * A290642 A295009 A310251

Adjacent sequences: A064826 A064827 A064828 * A064830 A064831 A064832

base,nonn

Jonathan Ayres (jonathan.ayres(AT)btinternet.com), Oct 23 2001

approved